Experimental study on the effect of SiO2 nanoparticle dispersion on the thermophysical properties of binary nitrate molten salt

Li, Ying; Chen, Xia; Wu, Yuting; Lu, Yuanwei; Zhi, Ruiping; Wang, Xin; Ma, Chongfang

doi:10.1016/j.solener.2019.03.036

Cited by 50 publications

(12 citation statements)

References 23 publications

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“…Additionally, the specific heat of the nanofluids showed different temperature-dependencies even in the liquid phase: increasing specific heat with temperature, uniform ones, and a slightly decreasing one. This was also found in previous research on the molten salt-based nanofluid [4,[30][31][32]. We believe that this results from the change in the nanoparticle dispersion in the measurement process.…”

Section: Specific Heat Capacitysupporting

confidence: 87%

Effects of SiO2 Nanoparticle Dispersion on The Heat Storage Property of the Solar Salt for Solar Power Applications

Zhao

Cui

et al. 2021

Energies

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The effects of SiO2 nanoparticles on the heat storage properties of Solar Salt (NaNO3-KNO3) are studied using experimental and molecular dynamics (MD) simulations. The experiment results show the specific heat capacity of the molten salt-based nanofluids is higher than that of the pure base salt. We focus on the inference regarding the possible mechanisms behind the enhancement of the specific heat capacity which are considered more acceptable by the majority of researchers, the energy and force in the system are analyzed by MD simulations. The results demonstrate that the higher specific heat capacity of the nanoparticle is not the reason leading to the heat storage enhancement. Additionally, the analysis of potential energy and system configuration shows that the other possible mechanisms (i.e., interfacial thermal resistance theory and compressed layer theory) are only superficial. The forces between the nanoparticle atoms and base salt ions construct the constraint of the base salt ions, further forms the interfacial thermal resistance, and the compressed layer around the nanoparticle. This constraint has a more stable state and requires more energy to deform it, leading to the improvement of the heat storage property of nanofluids. Our findings uncover the mechanisms of specific heat capacity enhancement and guide the preparation of molten salt-based nanofluids.

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Section: Specific Heat Capacitysupporting

confidence: 87%

Effects of SiO2 Nanoparticle Dispersion on The Heat Storage Property of the Solar Salt for Solar Power Applications

Zhao

Cui

et al. 2021

Energies

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“…The effect of particle size and volume fraction on the specific heat of SiO 2 molten salt nanofluid was investigated by Li et al [154]. Using SiO 2 nanoparticle with sizes of 10, 20, 30 and 60 nm, SiO 2 molten salt nanofluid was synthesised at particle concentration between 0.5 and 2%.…”

Section: Specific Heat Of Nanofluidsmentioning

confidence: 99%

An updated review of nanofluids in various heat transfer devices

Okonkwo

Wole‐Osho

Almanassra

et al. 2020

J Therm Anal Calorim

210

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The field of nanofluids has received interesting attention since the concept of dispersing nanoscaled particles into a fluid was first introduced in the later part of the twentieth century. This is evident from the increased number of studies related to nanofluids published annually. The increasing attention on nanofluids is primarily due to their enhanced thermophysical properties and their ability to be incorporated into a wide range of thermal applications ranging from enhancing the effectiveness of heat exchangers used in industries to solar energy harvesting for renewable energy production. Owing to the increasing number of studies relating to nanofluids, there is a need for a holistic review of the progress and steps taken in 2019 concerning their application in heat transfer devices. This review takes a retrospective look at the year 2019 by reviewing the progress made in the area of nanofluids preparation and the applications of nanofluids in various heat transfer devices such as solar collectors, heat exchangers, refrigeration systems, radiators, thermal storage systems and electronic cooling. This review aims to update readers on recent progress while also highlighting the challenges and future of nanofluids as the next-generation heat transfer fluids. Finally, a conclusion on the merits and demerits of nanofluids is presented along with recommendations for future studies that would mobilise the rapid commercialisation of nanofluids.

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“…Previous studies have been reported the enhanced specific heat capacity of a molten salt eutectic adding nanoparticles [17,[18][19][20][21][22][23][24][25][26][27][28][29][30][31]. Different types of a molten salt eutectic adding nanoparticles were prepared to measure its specific heat capacity in several studies [17].…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: A Novel Method for the Synthesis of Binary Molten Salt Nanofluids Adding SiO2 Nanoparticles

Seo

2020

Preprint

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In this study, the new method has been suggested for the synthesis of a binary molten salt eutectic adding nanoparticles (i.e. molten salt nanofluids). Solar salt (i.e. NaNO 3 -KNO 3 , 60:40 by weight) adding 10nm of SiO 2 nanoparticles was prepared to measure the specific heat capacity of molten salt nanofluids by a modulated differential scanning calorimeter (MDSC). In previous studies the sample preparation of a molten salt eutectic follows the same procedure. Each chemical of a molten salt eutectic and nanoparticles is dissolved in an aqueous solution. These homogeneous salts are completely mixed by a sonication. Nano-mixtures are scrapped off the bottom surface of a vial after drying. However, there are complex steps in the process of getting fresh molten salt eutectic nanofluids before MDSC measurements. An unexpected result is able to occur due to phase change (i.e. solid-liquid-solid) at each step and then it has an affect on the specific heat capacity of molten salt nanofluids. A suggested novel method (i.e. Liquid-to-Liquid) can not only prevent unexpected errors (e.g. the possibility of contamination) by phase change in the sample preparation, but also enhance the specific heat capacity of molten salt nanofluids.

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Experimental study on the effect of SiO2 nanoparticle dispersion on the thermophysical properties of binary nitrate molten salt

Cited by 50 publications

References 23 publications

Effects of SiO2 Nanoparticle Dispersion on The Heat Storage Property of the Solar Salt for Solar Power Applications

Effects of SiO2 Nanoparticle Dispersion on The Heat Storage Property of the Solar Salt for Solar Power Applications

An updated review of nanofluids in various heat transfer devices

WITHDRAWN: A Novel Method for the Synthesis of Binary Molten Salt Nanofluids Adding SiO2 Nanoparticles

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